Cylinder mounting for printing presses



Dec. 20, 1932. E. ERICKSSON CYLINDER MOUNTING FOR PRINTING PRESSES FiledMarch 21 1930 gmwnlio'c I 516M802:

Patented Dec. 20, 1932 UNITED STATES PATENT OFFICE EH11; ERICKSSON, OFCHI AGO, ILLINOIS, ASSIGNOR TO STANDARR PROCESS CORPO- RATION, OFCHICAGO, ILLINOIS, A CORPORATION OF DELAWARE CYLINDER MOUNTING FORPRINTING PRESSES Application filed March 21, 1930. Serial No. 437,841.

This invention pertains to the mounting of the printing rolls of aprinting press, and more especially to the mounting for such printingrolls on their arbor. More particularly, the invention relates to themounting of the printing cylinders of intaglio presses.

In intaglio printing presses it is necessary that the printing cylindersbe mounted on the mandrels or arbors in the same longitudinal positionparticularly} when color work is being done, since if t e cylinders arenot located in precisely the same position exact registry of thesuperposed printed matter will not be secured. These cylinders must ialso be readily removable from the mandrels or arbors, and must, when inposition, be rigidly mounted on the arbors for rotation therewith.

Various expedients have been resorted to bythe manufacturers of printingpresses for mounting the cylinders on the arbors. One form of suchmounting which is in common use, especially in textileand wall paperprinting machines, consistsof a tapered mandrel with a key-Way thereinand a solid copper cylinder with a tapered bore and a key for saidkey-way. Thls copper roll is pressed onto and removed from the taperedmandrel by a hydraulic press. The taper of the mandrel is very slight sothat after the mandrel has been pressed into position on the cylinderseveral times, the copper cylinder wears slightly and it is verydifiicult to get the mandrel and cylinder tightly united with the partsoccupying exactly the same relative longitudinal position each time.This brings about non-registry of the printing impressions in colorwork. Furthermore, where larger cylinders are used, in order not to havetoo heavy copper cylinders, the arbors are increased in diameter,although the j ournals of the press are the same. This makes excessivelyheavy arbors and of course a different set of arbors for differentdiameter c linders is necessary, resulting in considerable expense intheinitial equipment, and causing serious delays in the operation of themachine in changing over from one size arbor to another.

One object of this invention, therefore, is

to provide a novel mounting for the cylinders of an intaglio printingpress, whereby the cylinders may be invariably accurately positioned onthe arbors of the press with aminimum of labor.

Another object of this invention is to provide a mounting for thecylinder on its arbor of an intaglio printing press in which thecylinder is automatically positioned in correct longitudinal alignmentwhen the mounting means is-secured in position. I

Another object of this invention is to provide a mounting for thecylinders of an intaglio printing press in which the parts may bereadily assembled and disassembled by hand, without the use of machinessuch as hydraulic resses or the like.

These an various other objects of my invention will be apparent from thefollowing description and appended claims, when taken in connection withthe accompanying drawing, wherein Figure 1 is a longitudinal sectionthrough one mandrel of an intaglio press with the printing cylindermounted thereon.

Figure 2 is a section on line 2-2 ure 1.

Figure 3 is a section on line ure 1- r Referring to the drawing indetail, the arbor 1 is of such size as to fit the smallest diametercylinder to be used on the press. This arbor 1 has a key-way 2 adjacentone end thereof and has one or more grooves 3 therein adjacent each end.The printing cylinders for mounting on the arbor consist of an iron oraluminum cylinder4 having a platin 5 of copper on the external surfacethereo Preferably the cylinders are of the t pe in which the copperplate 5 containing t e printing image may be stripped from cylinder 4 tobe replaced by anotherplate 5 after use. The cylinder 4 has a key 6adapted for s'lidable engagement in the keyway 2 of arbor 1 for securingthe arbor and the cylinder against relative. rotation.

:The grooves 3 in the arbor 1 are adapted to receive the slotted washers7 which washers may be 'removably positioned in any of the grooves 3. toprovide stops on the arbor. Any

33 of Figof Fignumber of such grooves may be provided.

of the collar 11.

that when the pressure is relieved Assembly and disassembly of theprinting cylinder on its arbor is accomplished as follows. The grooves 3in the arbor 1 are so positioned that they will accommodate any of thevarious sizes of printing cylinders used. The printing cylinder 4 to beused is slipped on the arbor 1 and the two split cones 8 are thenslipped on from opposite ends. The slotted washer 7 at the left side ofFigure 1 is then positioned in the proper groove 3 of the arbor 1 andthe cylinder 4 is moved to the left so that the cone 8 enters theconical opening in the cylinder and bears against the washer 7. The ringmember 11 carryin the threaded nut 13 is then slipped on the right handend of the arbor 1 and the second split washer 7 is positioned in itscorresponding groove 3. By means of two spanner wrenches the nut 13 isthen turned on the threaded hnb12 of the ring 11 to engage against theslotted washer 7. Thus the right hand conical member 8 is forced intothe cylinder 4 and said cylinder 4 is forced to the left against thestop provided by the washer 7 and the split cone. Since the cones 8 aresplit they will contract into firm engagement with the arbor 1 and theywill accuratelyposition the cylinder 4 on saidarbor. It will be notedthat the left hand slotted washer 7 and its cone 8 will always occupythe same relative position on the arbor. Due part1 to the fact that thecylinder 4 is made of re atively hard metal, and due partly to the factthat the conical opening in said cylinder is of relatively great taper,there is very little. wear between theparts in assembling anddisassembling. Therefore continual use of the cylinder and the arborwill not change the longitudinal alinement of the parts. v

It is unnecessary to use a press to assemble or disassemble the cylinderand the arbor, since the tapering surfaces of the cylinder and the cones8 are of such a sharpJ angle .v screwing the nut 12, the split cones 8will readily spring outwardly from the cylinder.

With this construction the same size of arbor can be used regardless ofthe diameter of the printing cylinders without increasing the thicknessof the walls of the cylinders, and the same cones, locknuts, and washerscan also be used. Thus it will only be necessary for the users of thistype of cylinder and mandrel to have one set of arbors for the pressinstead of several sets as needed for the types wherein the cylinderslides directly on a tapered mandrel and engages therewith.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiment is therefore to be considered in all respects as illustrativeand not restrictive, the scope of the invention being indicated by theappended claims rather than by the foregoing description, and allchanges which come within the meaning and range of equivalency of theclaims are therefore intended to be embraced therein.

What I claim and desire to secure by United States Letters Patent is 1.In a mounting for the printing cylinders of a printing press, an arbor,a printing cylinder on said arbor, a plurality of grooves in said arborbeyond eachend of said cylinder, stop members selectively engageable insaid grooves for securing various sizes of cylinders to said arbor,split cones between each stop member and the cylinder, and engageable inconical openings in said cylinder, and a slidable collar on said arborbetween one of said cones and the adjacent stop, and meanslongitudinally adjustable on said collar for simultaneously wedging saidcones in said conical openings and for clamping the same between saidcylinder and said stop means.

2. In a printing press, an untapered arbor provided with a pair ofgrooves disposed at points along the length thereof, a cylinder providedat each end with conical recesses thatare sharply inclined with respectto the axis thereof, cones slidably disposed on said arbor and fittingin said recesses, at least one of said cones being split for resilientcontraction and expansion,-laterally removable stops positioned in saidgrooves, and means arranged between one of said stops and one of saidcones to apply pressure along the length of said arbor to simultaneouslywedge both cones in said recesses and to properly locate. said cylinderwith respect to the other of said stops, said means being substantiallyfreely'movable axially when it is not-applying pressure.

In testimony whereof I aflix my si ature.

EMIL ERICK SON.

